There are three primary ways that casinos can win in blackjack: getting the player to lose more money than they originally put in, getting the player to put more money in than they can afford to lose, and taking advantage of player mistakes.
The casino can tempt a player into losing more money by providing bad cards or by giving away free rounds of blackjack. If a player is losing consistently, the casino may encourage them to gamble more by increasing the ante or giving away additional free rounds.
Casinos also rely on players making mistakes. A player who is not familiar with the game may make careless decisions based on their intuition, leading to larger losses.
Casinos may also tempt players by providing bigger payouts for certain hands, such as a two-card 21. Finally, casinos may employ card counting techniques in order to exploit any mistakes a player might make.
